After using RoundCube for several years now I have come to find that implementing Check Boxes would be extremely useful, time saving and less frustrating when it comes to deleting emails.
The current system of selecting all mail whilst holding down ctrl is a bit fiddly and I would very much appreciate check boxes being added in the way that Hotmail allows you to simply check the boxes instead of holding down ctrl as well as being able to check a 'select all mail' box for easy deleting of all emails together without having to go through and select each one individually.
Thanks.
iirc there is a plugin for this.
For reference here is link to the checkbox plugin: https://github.com/umount/rcplugin_chbox (https://github.com/umount/rcplugin_chbox)
Deleting emails was really really really problematic before using roundcube plug-in and I'm happy now that it's make my life easy.